Chiral magnetohydrodynamic turbulence in core-collapse supernovae

Abstract

Macroscopic evolution of relativistic charged matter with chirality imbalance is described by the chiral magnetohydrodynamics (chiral MHD). One such astrophysical system is high-density lepton matter in core-collapse supernovae where the chirality imbalance of leptons is generated by the parity-violating weak processes. After developing the chiral MHD equations for this system, we perform numerical simulations for the real-time evolutions of magnetic and flow fields, and study the properties of the chiral MHD turbulence. In particular, we observe the inverse cascade of the magnetic energy and the fluid kinetic energy. Our results suggest that the chiral effects that have been neglected so far can reverse the turbulent cascade direction from direct to inverse cascade, which would impact the magnetohydrodynamics evolution in the supernova core toward explosion.

19 pages, 17 figures, Accepted for publication in PRD. Movies of the simulations are available at http://www.kusastro.kyoto-u.ac.jp/~masada/movie.mp4

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• Effective Chiral Magnetic Effect from Neutrino Radiation
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• Gauge Field Production and Schwinger Reheating in Runaway Axion Inflation
• Permanent mean spin source of the chiral magnetic effect in neutron stars
• Magnetar field dynamics shaped by chiral anomalies and helicity
• Magnetic helicity in plasma of chiral fermions electroweakly interacting with inhomogeneous matter
• Reality of inverse cascading in neutron star crusts
• Cosmological chirality and magnetic fields from parity violating particle decays
• Efficiency of dynamos from an autonomous generation of chiral asymmetry
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• Generation of strong magnetic fields in old neutron stars accounting for continuous chiral magnetic effect
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• Reconnection of magnetic fields in neutron stars driven by the electron mass term in the triangle anomaly
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